Yog lawm, cov raj square tuaj yeem ntseeg tau siv sab nraum zoov, muab cov khoom siv zoo thiab kev kho saum npoo raug xaiv los tiv thaiv ib puag ncig cov teeb meem xws li corrosion, UV raug, thiab kub hloov pauv. Hauv qab no yog cov ncauj lus kom ntxaws txog lawv qhov tsim nyog rau kev siv sab nraum zoov, nrog rau cov lus pom zoo:
1. Yam tseem ceeb cuam tshuam rau kev siv sab nraum zoov
A. Corrosion Resistance
Carbon Steel (Q235B, Q355B):
Qhov teeb meem: Nws tuaj yeem xeb hauv qhov chaw ntub dej lossis ntug hiav txwv vim yog hlau oxidation.
Kev daws:
Kub-Dip Galvanizing: Coats lub raj nrog 60-100μm zinc txheej (ib ISO 1461 / ASTM A123), muab 20-50 xyoo ntawm kev tiv thaiv corrosion hauv cov chaw nyob deb nroog / nroog.
Xim Txheej: Epoxy lossis polyurethane xim tuaj yeem siv tau tom qab galvanizing ntxiv rau cov kav ntev.
Stainless hlau (304, 316L):
Qhov zoo: muaj chromium (Ntau dua lossis sib npaug li 10.5%) thiab npib tsib xee, tsim cov txheej txheem oxide passive uas tiv thaiv corrosion.
Qhov zoo tshaj plaws rau: thaj chaw ntug hiav txwv, cov nroj tsuag tshuaj, los yog siab - thaj chaw av noo.
Qib Xaiv:
304: Haum rau feem ntau qhov chaw sab nraum zoov.
316L: Muaj molybdenum (2-3%), muab kev tiv thaiv zoo tshaj rau cov tshuaj chlorides (xws li tshuaj tsuag ntsev).
Aluminium Alloy (6061, 6063):
Advantage: Ib txwm tsim cov txheej txheem txhuas oxide, tiv thaiv corrosion ntxiv.
Qhov zoo tshaj plaws rau: Cov qauv teeb (piv txwv li, hnub ci carports, pergolas) nyob rau hauv tsis yog - cheeb tsam kev lag luam.
B. UV Resistance
Painted / Coated Tubes: UV- cov xim ruaj khov (xws li, polyester hmoov txheej) tiv thaiv cov xim fading thiab degradation degradation.
Stainless hlau / Aluminium: Inherent UV tsis kam; tsis xav tau kev kho mob ntxiv.
C. Temperature Tolerance
Carbon Steel: Ua haujlwm zoo hauv -20℃txog 400℃ntau yam tab sis tuaj yeem nthuav dav / cog lus nrog kev hloov pauv kub.
Aluminium: Zoo thermal conductivity (txo cov cua sov tsim) thiab tswj lub zog ntawm qhov kub thiab txias (xws li -80℃rau 6061-T6).
2. Pom zoo daim ntawv thov & cov khoom xaiv
| Daim ntawv thov | Khoom siv pom zoo | Kev kho saum npoo | Lifespan (Xyoo) |
|---|---|---|---|
| Solar (hauv av / ru tsev) | Q355B carbon hlau | Kub-dip galvanizing + xim txheej | 25–30 |
| Cov qauv ntawm ntug hiav txwv | 316L Stainless hlau | Tsis muaj (los yog electropolishing rau kev zoo nkauj) | 50+ |
| Vaj rooj tog / Pergolas | 6063 Aluminium Alloy | Anodizing los yog hmoov txheej | 20–30 |
| Cov khoom siv ua liaj ua teb | Q235B carbon hlau | Kub-dip galvanizing | 15–20 |
| Txoj Kev Loj Guardrails | Q345B carbon hlau | Kub-dip galvanizing | 15–25 |
3. Kev txiav txim siab tseem ceeb rau cov phiaj xwm sab nraum zoov
A. Ib puag ncig hnyav
Nyob deb nroog / Nroog: Muaj kev pheej hmoo corrosion; kub-dip galvanizing txaus.
Ntug hiav txwv / Kev Lag Luam: Muaj kev pheej hmoo corrosion; siv 316L stainless hlau los yog txhuas nrog tuab txheej.
B. Cov qauv Loads
Static Loads (piv txwv li, hnub ci vaj huam sib luag): Txheem 40 × 40 × 2mm Q235B hlab ua haujlwm.
Dynamic Loads (piv txwv li, cua / daus): Hloov mus rau 60 × 60 × 3mm Q355B hlab lossis stainless hlau rau ntxiv zog.
C. Kev tu
Galvanized Steel: Tshawb xyuas txhua 5-10 xyoo rau zinc txheej kev ncaj ncees; kov cov khawb nrog zinc- nplua nuj xim.
Stainless Hlau: Ntxuav txhua xyoo nrog xab npum me me thiab dej kom tshem tawm cov av / grime.
Aluminium: Tsis muaj kev saib xyuas loj; zam cov tshuaj abrasive kom tsis txhob khawb.
4. Kev Tshawb Fawb Kev Lag Luam
Dubai Solar Park: Siv 60 × 60 × 3 mm Q355B kub-dip galvanized raj rau hauv av- mounted hnub ci arrays, withstanding 50℃kub thiab xuab zeb.
Sydney Opera House Pergolas: Tsim los ntawm 6063-T5 txhuas raj (hmoov-coated), tswj kev zoo nkauj txawm tias muaj ntsev ntawm ntug dej hiav txwv.
Norwegian Nuv Ntses Pier: Ua nrog 316L stainless hlau square raj, tiv thaiv dej hiav txwv corrosion rau ntau tshaj 30 xyoo.
Xaus
Square tubes yog qhov tsim nyog rau kev siv sab nraum zoov thaum:
Cov khoom sib tw rau ib puag ncig tej yam kev mob (xws li, stainless hlau rau coasts, aluminium rau lub teeb yuag xav tau).
Kev kho kom zoo (galvanizing, pleev xim, anodizing) yog siv.
Tus qauv tsim nyiaj rau kev thauj khoom thiab thermal expansion.
Rau tus nqi- zoo, ntev- kev daws teeb meem sab nraum zoov, kub-dip galvanized carbon steel (xws li, Q355B) feem ntau yog qhov kev xaiv zoo tshaj plaws, thaum stainless hlau lossis aluminium excel hauv harsher lossis zoo nkauj- cov ntawv thov tseem ceeb. Nco ntsoov sab laj nrog tus kws tsim qauv tsim qauv kom siv tau cov qauv tsim rau koj qhov project tshwj xeeb.
